Sandvik Ab

Santrade, Ltd

Lars-Erik Gustafsson

Lars T Pettersson

Jorgen V Wiman

Pekka Ovaska

Tord S Muren

Stiv E Carlsson

Karl T Robertsson

Lars S Birgersson

Lars H Ericksson

The present invention provides an indexable insert for grooving operations, the basic form of which is triangular, the insert comprises extensions in each cutting corner. Each extension has a cutting edge which intersects with two converging edges. The extensions may have a symmetrical or non-symmetrical configuration. The top surface of the extension provides a rake face in regard to the cutting edge and a clearance face of the cutting edge is oriented in the direction of the thickness of the insert.

Cutting insert for grooving operations

A cut-of tool comprises a thin holder plate of steel, and a cutting insert of cemented carbide. The holder plate has an outwardly opening, insert-receiving recess defined by a bottom wall, an inner wall and an upper wail which is part of an elastically movable clamping arm serving to retain the insert in the recess. The insert has both upper and lower grooves of V-shaped cross-section, which are adapted to cooperate with corresponding V-shaped ridges associated with the recess. Between the insert and the bottom wall of the recess, there is provided a dismountable spacer element of cemented carbide, which has on its upper side a V-ridge for engaging a corresponding V-groove in the underside of the insert. The spacer element is maintained in place, on the one hand, by a countersunk connecting device in the area of the outer end of the bottom wail and, on the other hand, by a male-female connection between the inner wall of the recess and a rear end of the element.

Tool provided with an insert for cut-off or similar turning operations,

Cutoff insert

The invention relates to an indexable cutting insert for recessing. The insert (10) has a triangular basic shape and comprises three cutting edges. Each cutting edge is arranged at a projection (16) which at least partly is asymmetrically arranged relative to a line parallel with the working direction (I) of the insert. The insert has a good accessibility at work pieces having narrow spaces.

Indexable cutting insert

A single-sided cutting insert preferably for thread chasing, the lower face of which comprises three support surfaces inclining towards the center of the lower face and a recess separating them. The support surfaces are projecting partly around the recess and therefore the cutting insert at insertion against a base surface of a cutting insert site in a tool shank abuts only against the planar base surface in three separated points.

Single-sided cutting insert

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Sandviken, Sweden

Lars-Erik Gustafsson